Randomizing split directions in forests helps when variance dominates bias, which occurs at low signal-to-noise ratio and with correlated covariates, but hurts when irrelevant covariates or fat-tailed features make bias dominant.
The hedged random forest
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When do Random Forests work?
Randomizing split directions in forests helps when variance dominates bias, which occurs at low signal-to-noise ratio and with correlated covariates, but hurts when irrelevant covariates or fat-tailed features make bias dominant.